#include <bits/stdc++.h>
// #pragma GCC optimize("Ofast")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,fma,abm,mmx,avx,avx2")
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rrep(i, n) for (int i = (int)(n - 1); i >= 0; i--)
#define all(x) (x).begin(), (x).end()
#define sz(x) int(x.size())
#define yn(joken) cout<<((joken) ? "Yes" : "No")<<"\n"
#define YN(joken) cout<<((joken) ? "YES" : "NO")<<"\n"
using namespace std;
using ll = long long;
using vi = vector<int>;
using vl = vector<ll>;
using vs = vector<string>;
using vc = vector<char>;
using vd = vector<double>;
using vld = vector<long double>;
using vvi = vector<vector<int>>;
using vvl = vector<vector<ll>>;
using vvs = vector<vector<string>>;
using vvc = vector<vector<char>>;
using vvd = vector<vector<double>>;
using vvld = vector<vector<long double>>;
using vvvi = vector<vector<vector<int>>>;
using vvvl = vector<vector<vector<ll>>>;
using vvvvi = vector<vector<vector<vector<int>>>>;
using vvvvl = vector<vector<vector<vector<ll>>>>;
using pii = pair<int,int>;
using pll = pair<ll,ll>;
const int INF = 1e9;
const ll LINF = 2e18;
template <class T>
bool chmax(T& a, const T& b) {
    if (a < b) {
        a = b;
        return 1;
    }
    return 0;
}
template <class T>
bool chmin(T& a, const T& b) {
    if (b < a) {
        a = b;
        return 1;
    }
    return 0;
}
bool ispow2(int i) { return i && (i & -i) == i; }
bool ispow2(ll i) { return i && (i & -i) == i; }
template <class T>
vector<T> make_vec(size_t a) {
    return vector<T>(a);
}
template <class T, class... Ts>
auto make_vec(size_t a, Ts... ts) {
    return vector<decltype(make_vec<T>(ts...))>(a, make_vec<T>(ts...));
}
template <typename T>
istream& operator>>(istream& is, vector<T>& v) {
    for (int i = 0; i < int(v.size()); i++) {
        is >> v[i];
    }
    return is;
}
template <typename T>
ostream& operator<<(ostream& os, const vector<T>& v) {
    for (int i = 0; i < int(v.size()); i++) {
        os << v[i];
        if (i < int(v.size()) - 1) os << ' ';
    }
    return os;
}

void solve(){
    string S;
    cin>>S;
    int Y=stoi(S.substr(0,4)),M=stoi(S.substr(5,2)),D=stoi(S.substr(8,2));
    D+=2;
    vi B={1,3,5,7,8,10,12};
    bool flg=false;
    rep(i,7) if(M==B[i]) flg=true;
    if(flg){
        if(D>=32){
            M++;
            D-=31;
        }
        if(M>=13){
            Y++;
            M-=12;
        }
    }
    else{
        if(M==2){
            bool uru=false;
            if(Y%400==0){
                uru=true;
            }
            else{
                if(Y%100==0) ;
                else{
                    if(Y%4==0) uru=true;
                }
            }
            if(uru){
                if(D>=30){
                    M++;
                    D-=29;
                }
                if(M>=13){
                    Y++;
                    M-=12;
                } 
            }
            else{
                if(D>=29){
                    M++;
                    D-=28;
                }
                if(M>=13){
                    Y++;
                    M-=12;
                }
            }
        }
        else{
            if(D>=31){
                M++;
                D-=30;
            }
            if(M>=13){
                Y++;
                M-=12;
            } 
        }
    }
    printf("%04d/%02d/%02d",Y,M,D);
}

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    solve();
}